Bush-hammer



(No Model.)

0. P. HOWARD.

BUSH HAMMER.

Inven 1501? UNiTnn STATES PATENT @Tmen.

OOTAVE P. II()\VARD, OF ROCKLAND, MAINE.

BUSH-HAMMER.

SPECIFICATION forming part of Letters Patent No. 430,649, dated June 24,1890.

Application filed January 22, 1890- Serial No. 337,775. (No model.)

To all whom it may concern:

Be it known that I, OCTAVE l HOWARD, residing at Rockland, in the countyof Knox and State of Maine, have invented a new and ImprovedBuslrl'lammcr, of which the following is a specification.

My invention relates to improvements in lnish-hammers; and the objectsof myimprovements are, first, to secure agib or hearing for the cuts orknives a part of and as solid as the pole itself, it being a part of thepole. The essential feature of a bush-hammer is to have the pole holdthe cuts or knives so rigidly as to cause the hammer to rebound whenstruck on the granite or stone. The moment the cuts become loose or movein the slightest degree the hammer is called a loose hammer, and istiresome to work and does iinperfect work; second, to secure the headsor side flanges of the gib as a part of and as solid as the pole itself,to prevent anylateral movement of the cuts; third, to lock the two sidesof the pole of a bush-hammer by a dovetail mortise, so as to prevent anylongitudinal movement of the sides; fourth, to secure a pole for abush-hammer, composed of only two parts, each being the duplicate of theother, and the same mold will cast or form either side; fifth, to securea bush-hammer in which the gib or anvil receives severest and continuedpounding on its strongest part; sixth, a bush-hammer whose jaws can beopened, and cuts of varying thickness used in the jaws, so that samebush-hammer pole can be used for a heavy or light hammer by opening itfor heavy cuts and coarse work, or by closing the jaws for light cuts;also made into a scotia hammer by closing the jaws as close as may benecessary; seventh, a bushhammer whose eye can be made in halves, andcan thus be cast, and avoid the expense of boring a round or oblong holein the pole; eighth, a bush-hammer pole in which the eye, when madelarger or smaller by opening the sides of the pole to receive differentor more numerous cuts, still retains a bearing-surface on the entirecircumference of the handle, the larger or smaller hole being filled bydriving the handle into the eye to a greater or lesser extent. I attainthese obj eets by the mechanism illustrated in the following drawings,in which- Figure 1 is a perspective view of the whole hammer. Fig. 2 isa perspective view of one half of the pole. Fig. 3 is a perspective viewof the other half of the pole.

Similarletters refer to similar parts throughout the several views.

A B O is the pole made solid of two partsduplicates of each other,except that one may be called the right and the other the left as theyfit together. 7 I a Z) c is the gib or anvil with its two heads; a 1) (LI), the heads of the gibs, used to prevent any lateral movement of thecuts or knives; D E, the cuts or knives; F G, the shoulder on which oneend of the gib or anvil rests; s s s 8, each one-half the eye of thehammer or hole to receive the handle; :0 0c 00 :12, holes for thescrew-bolts or set-screws of the hammer; c d, a mortise on the sides ofthe jaw of hammer to receive part of the gibs or anvil.

Z m indicate a portion cutout of the plate on each side, making awedge-shaped recess to admit the projecting heads of the gib, and Whichtogether form a dovetail mortise or fastening.

hen the hammer is set up or put together, the projecting heads of thegib a b of one half look its opposite half, and the projecting heads ofthe opposite half lock the first half, and the side projection of eachhalf locks the cuts D E laterally. These heads of the gib also,.by meansof the dovetail mortise 71; Z on, lock the two sides of the pole, so asto prevent any longitudinal movement. The mortise c d in one side of thejaw of the pole admits the end of the gib of the opposite side, and bythis means renders it possible to open or close the jaws of the pole tothe extent of the depth ofthe mortise.

The opening and closing of the two sides of the pole will vary the sizeof the eye of the pole; but this is met by driving the handle into theeye to a greater or lesser extent, as may be necessary.

Another advantage is obtained by the mortiseedviz.,the shoulder F Gisbyit made wide and affords a more solid bearing for the anvil or gibabc. The gib a b 0, being a part of the pole itself, is rigid and cannotbecome loose or move in any way to make the hammer a loose hammer, butwill preserve the rebound of the clip essential to easy and good work.C, the anvil on which the cuts rest, or the gib, is solid on one side ofthe pole. end of the pole is solid on the opposite side. The advantageof this is that when the hammer is used in voluntarily the edge of thehammer toward the right hand strikes the stone first, and hence theright sides of the cuts receive most of the force of the blow, and thisextra force is received on that part of the anvil nearest the side towhich it is united solidly. Then the other end of the hammer is used,the same result is obtained.

The hammer can be used as a left-hand hammer by inserting the handle inthe opposite side. i

The bolts 50 00 00 as are used to set the jaws of the pole firmlyagainst the cuts.

I am aware that prior to myinvention bushhammer poles have been madefrom one piece with a spring or slight attainable movement of the jaws;also made in two parts with a gib or rigid bearing at the bottom of thecuts. I

therefore do not claim such combinations, broadly; but

What I do claimas my invention, and desire to secure by Letters Patent,is

1. A bush-hammer pole formed of two interlocking duplicate halves havinga mortise The anvil of the other.

or notch e d in their sides just below their jaws and between the jawand the eye, with an interlocking gib a b c, and interlocking heads a bof the same gib, the jaws of which pole maybe made larger or smaller toaccommodate different-sized cuts, and having a wedge-shaped mortise 7."l 101,, so as to make it dovetailed in form to fit a corresponding parta b of the opposite half of the pole, all substantially as set forth.

2.'A bush-hammer pole, in Which the projecting heads of a gib, the samebeing a part of the pole itself, in combination with the wedge-shapedrecess 76 Z m, make a dovetailed mortise, which locks the opposite sidesof the pole of the hammer longitudinally, substantially as described.

3. The combination, in a lmsh-hammer, of the projecting head of gib, ofone of the sections provided with the dovetailed mortise f g, with thedovetail interlocking plate 8 (l of the other section, all substantiallyas and for the purposes set forth.

OCTAVE P. HOWARD.

Witnesses:

H. A. HOWARD, I J. P. CILLEY.

